| 331 | Morvydd (-), parents: Goronwy |
| 332 | Nesta (-) |
| 333 | Oliver St John (-) |
| 334 | Owen Tudor (1400-2 February 1461), parents: Maredudd ap Tewdwr and Margred |
| 335 | Payn de Roët (-) |
| 336 | Pedro I "el Cruel" (30 August 1334-22 March 1369), King of Castile |
| 337 | Philippa (of Gloucester?) (1389-before 3 October 1399), parents: Thomas "of Woodstock" and Eleanor de Bohun |
| 338 | Philippa de Hainaut (1314-15 August 1369), parents: Guillaume III "le Bon" and Jeanne de Valois |
| 339 | Philippa de Mohun (-17 July 1431) |
| 340 | Philippa of Clarence (16 August 1355-between 21 November 1378 and 9 February 1381), Ctss of Ulster, parents: Lionel "of Antwerp" and Elizabeth de Burgh |
| 341 | Philippa of Lancaster (31 March 1360-19 July 1415), parents: John of Gaunt and Blanche of Lancaster |
| 342 | Philippe (-after 1201), Seigneur de Cognac, parents: Richard I "Cœur-de-lion" |
| 343 | Ralph Bloet (-) |
| 344 | Ralph Boteler (-), Lord Sudeley |
| 345 | Ralph de Neville (1364-21 October 1425), Earl of Westmoreland, parents: John Neville and Matilda Percy |
| 346 | Ralph de Stafford (-1347 or before) |
| 347 | Ralph Le Scrope of Upsall (after 1459-17 September 1515), Lord Scrope of Masham, parents: Thomas Le Scrope and Elizabeth de Greystoke |
| 348 | Ranulf "de Blundeville" (around 1170-28 October 1232), Earl of Chester, parents: Hugh "of Kevelioc" and Bertrade de Montfort |
| 349 | Raoul (-), parents: Stephen and Dameta |
| 350 | Raymond VI (-), Comte de Toulouse |
| 351 | Reginald Grey (1421-22 February 1494), Lord Grey |
| 352 | Rhys (-), parents: Tudur Fychan and Margaret |
| 353 | Richard (5 January 1209-2 April 1272), Earl of Cornwall, parents: John and Isabelle d’Angoulême |
| 354 | Richard (-), parents: Henry II |
| 355 | Richard (-), parents: Henry III and Eleonore de Provence |
| 356 | Richard "of Conisburgh" (probably 1375/76-5 August 1415), Earl of Cambridge, parents: Edmund of Langley and Isabel de Castilla |
| 357 | Richard "of Shrewsbury" (17 August 1473-1483), Duke of York, parents: Edward IV and Elizabeth Wydeville |
| 358 | Richard de Normandie (1054 or 1056-1075 or 1081), Duc de Bernay, parents: William I "the Conqueror" and Mathilde de Flandre |
| 359 | Richard FitzAlan (1313-24 January 1376), Earl of Arundel, parents: Edmund FitzAlan and Alice de Warenne |
| 360 | Richard I "Cœur-de-lion" (8 September 1157-6 April 1199), King of England, parents: Henry II and Eleonore d'Aquitaine |